Analysis of Lodging Resistance of Three Mainly Promoted Wheat Varieties

[Objective]The lodging resistance of wheat varieties was studied to further improve the lodging resistance ability of main varieties,and provide some references for the popularization and application of wheat lodging resistance breeding. [Method] Using three wheat varieties Jimai22,Liangxing66,Shannong17 which mainly promoted in Shandong Province as test materials. The relations of G,H,S and lodging index with other stem traits at different densities were analyzed,the strength of its lodging capacity was evaluated. [Result]Jimai22,Liangxing66 obtained the maximum yield under the density of 2. 70 million / hm2,Shannong17 obtained the maximum yield under the density of 2. 25 million / hm2. Under the same density,the lodging index was the biggest at the dough stage and smallest at the booting stage. The lodging index at the blossom period was bigger than that at the milk stage,the lodging index increased with the increase of density under the same growth period. [Conclusion]The lodging resistance order of three varieties was Liangxing66,Jimai22,Shannong17.